Dynamat Original is a Styrene-Butyadine-Rubber based and Pressure Sensitive Adhesive Backed, Heat Bondable, Sheet Metal Vibration Damper. This product is made to conform and fuse to automotive body surfaces such as floor pans and doors. Product shall be die cut to shape and placed onto the body surface after sheet metal cleaning operation and prior to the paint system (typically at the sealer application operation) or on painted panels. Adhesive side is smooth, giving complete contact with the underlying surface without any air pockets of channels. Both material and adhesive can withstand temperature ranges between -30C to +177C(-22F to +350F) and are highly resistant to aging.

Acoustic Properties: The acoustic loss factor " n " is used as a measure of ability to damp structure-borne sound. It states how much vibrational energy (in steel sheets, for instance) is converted into heat rather than sound. For constructions containing several layers, the combined loss factor " n comb " is used. The theoretical maximum loss factor is about 1. An undamped steel panel 1 mm thick has a loss factor of roughly 0.001 at 200 Hz. Damped with Dynamat Original the loss factor would be about 0.16 at +0C(32F).

Installation: Dynamat should be cut to the desired size and shape before the backing paper is removed. It may be cut with scissors, knife, or die. Remove dust, grease, moisture, and other foreign matter from the application surface. Peel off the backing paper. The simplest application technique is to bend the pad slightly and attach it along its shortest edge. The pad is then pressed firmly into place, preferably with a roller for larger pieces. This reduces the risk of leaving air pockets, which reduce the sound damping capacity. The temperature of the pad and application surface should not be below room temperature during fitting. Heating the material before applying is strongly recommend, and increases flexibility, strechability, and adhesion.

Coverage: How much is enough? Always the first good question. You do not need to cover the entire panel--edge to edge. Cutting the Dynamat material into one inch strips and spacing it out over a panel to achieve a 30 to 50 percent coverage will give you excellent sound deadening characteristics.

The Knuckle Test: Rap your knuckles on the panel before you install any Dynamat to learn what a bare panel sounds like. Then adhere a one inch strip of Dynamat in the center of the panel.

Rap it again to see out the sound has changed. Add another piece of material to the left and right of your center piece, splitting the difference between the edge of the panel and your center strip.

Rap the panel again to hear how the sound has changed. Repeat this process until you are satisfied with the “density” of the sound level.

Surface Preparation: The time spent in preparing the surface is equal to the satisfaction and success of your efforts. Whenever possible, sandblasting the surface of metal body panel and floor pans is highly recommended. On body panels fiberglass bodied cars, should be thoroughly cleaned before applying Dynamat.

In floor and trunk pans, weld and seal any rust holes and then prime and paint the surface area as desired.

Note: Dynamat is not a solution to the treatment of rust problems.

Clean these surfaces with a metal prep type solvent material to remove all dirt, oil, tar, glue and wax deposits. The preparation of vertical surfaces is particularly important for adhesion.

Contour Conditions: Dynamat can be heated with a heat gun to make it more pliable to stretch over humps and to penetrate valleys and crevasses. Heat the material—don’t cook it! Wear canvas or leather gloves to protect your hands from heated material.

Multiple layers: The Vibra-Mat material is 0.70" thick. The mat material can be "built up" through multiple layers for greater sound-deadening capacity if needed.

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